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“Coffee ring” controlment in spray prepared >19% efficiency Cs_(0.19)FA_(0.81)PbI_(2.5)Br_(0.5) perovskite solar cells

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Journal of Energy Chemistry 2022年第4期31卷 201-208页

作者： Xinxin Yu Jing Li Yanping Mo tianxing xiang Zhiliang Ku Fuzhi Huang Fei Long Yong Peng Yi-Bing Cheng State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070HubeiChina Wuhan University of Technology Advanced Engineering Technology Research Institute of Zhongshan City Zhongshan 528437GuangdongChina College of Materials Science and Engineering Guilin University of TechnologyGuilin 541004GuangxiChina

Achieving high-quality perovskite films with uniform morphology and homogeneous crystallinity is challenging owing to the coffee ring effect(CRE) in the spray-coating technologies. In this study, an evaporation/spray-coating two-step deposition method is used to fabricate Cs_(0.19)FA_(0.81)PbI_(2.5)Br_(0.5)light harvesters for perovskite solar cells(PSCs). Considering the solid–liquid reaction, we establish a reaction-dependent regulating strategy that inhibits CRE successfully and prepare a high-quality perovskite layer, wherein the solvent for the FAI/Br solution during the spraying process is changed from isopropanol to n-butyl alcohol(NBA). The retarded-drying-enhanced spreading of the NBA solution inhibits contact line pinning to suppress the capillary flows and increases the reaction between metal halides(CsI/PbI_(2)) and organic salts(FAI/Br), which result in a reduction in the accumulation of solutes in the periphery effectively inhibiting CRE. Consequently, we obtain a high performance Cs_(0.19)FA_(0.81)PbI_(2.5)Br_(0.5) PSC with a power conversion efficiency(PCE) of 19.17%. An enlarged perovskite film(10 × 10 cm^(2)) containing 40 sub-cells is prepared. The average PCE of these devices is 18.33 ± 0.56%, proving the reliability of the "coffee ring" regulating strategy. This study provides an effective approach for CRE controlment in spraying technology to achieve high repeatability devices with good performance.

关键词： Cs_(0.19)FA_(0.81)PbI_(2.5)Br_(0.5)perovskite solar cells Spray coating Coffee ring effect Reaction-dependent regulating strategy

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数字经济核心产业空间集聚水平及其影响因素——基于新一代信息技术战略性新兴产业视角

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科技管理研究 2023年第5期43卷 197-203页

作者：贺刚向天星西华大学经济学院四川成都610039

在考虑空间外溢性的基础上,从政府维度与市场维度出发,运用2010—2019年我国29个省级的面板数据,构建莫兰指数,同时选取空间杜宾模型进行空间计量分析,考察新一代信息技术产业的空间集聚水平及其影响因素。结果发现:我国新一代信息技术... 详细信息

在考虑空间外溢性的基础上,从政府维度与市场维度出发,运用2010—2019年我国29个省级的面板数据,构建莫兰指数,同时选取空间杜宾模型进行空间计量分析,考察新一代信息技术产业的空间集聚水平及其影响因素。结果发现:我国新一代信息技术产业具有显著的空间集聚效应,不同地区之间的发展程度存在明显的不均衡现象,其中北京、广东、上海、江苏的产业集聚水平和程度明显高于全国平均水平;新一代信息技术产业集聚具有一定的空间关联性,能够产生一定的空间外溢效应;政府政策、人力资本、创新能力、关联产业以及城镇规模对新一代信息技术产业集聚有助推作用;比起新一代信息技术产业,市场对具有较高收益的金融业、城镇化更具有偏好性,因而对新兴产业发展存在抑制效应。为此,应转变城镇化进程中政府对土地财政的偏好,增加对新一代信息技术产业等新兴产业的财政扶持力度。

关键词：新一代信息技术产业产业集聚空间外溢区位熵指数空间相关性

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新冠肺炎疫情对康养产业发展的影响研究--以攀枝花市为例

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中国名城 2021年第12期35卷 55-60页

作者：贺刚王可向天星西华大学经济学院成都610039

新冠肺炎疫情的爆发,对全国经济产生了巨大的冲击,激发了人们自身的风险防范意识和健康保障需求,康养产业发展得到进一步重视。分析疫情对康养产业发展影响的一般机制,以攀枝花市为例,研究了疫情对当地经济发展的影响,从康养农业、康养... 详细信息

新冠肺炎疫情的爆发,对全国经济产生了巨大的冲击,激发了人们自身的风险防范意识和健康保障需求,康养产业发展得到进一步重视。分析疫情对康养产业发展影响的一般机制,以攀枝花市为例,研究了疫情对当地经济发展的影响,从康养农业、康养制造业、康养旅游业三个方面分析了疫情带来的冲击,探讨在此背景下产业发展面临的机遇,包括数字技术的发展、消费观念的转变和未来政策的倾斜。结合当地情况,提出康养产业应该面向精细化发展,提高行业竞争力;充分挖掘特色资源,打造知名品牌;着力推进产业融合,完善“康养+”体系;积极发展数字化道路,激发行业创新活力。

关键词：新冠疫情攀枝花市康养产业康养旅游业

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Single-source-precursor synthesis and air-plasma ablation behavior of(Ti,Zr,Hf)C/SiC ceramic nanocomposites at 2200℃

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Journal of Advanced Ceramics 2024年第7期13卷 1043-1059页

作者： Li Lu Qingbo Wen Jinrun Hu tianxing Jiang xiangchao Ren Yalei Wang Yi Zeng xiang Xiong State Key Laboratory of Powder Metallurgy Central South UniversityChangsha 410083China

Dense monolithic(Ti,Zr,Hf)C/SiC ceramic nanocomposites with four different molar ratios of metallic elements in the(Ti,Zr,Hf)C phase(i.e.,Ti:Zr:Hf=1:1:1,2:3:5,2:3:3,and 1:2:1)were prepared upon pyrolysis of novel(Ti,Zr,Hf)-containing single-source precursors(SSPs),followed by spark plasma sintering(SPS).A thorough characterization was conducted to elucidate the synthesis of the SSPs,polymer-to-ceramic transformation,chemical/phase compositions,and microstructure of the SiTiZrHfC-based *** results revealed the feasibility of synthesizing nanocomposites with high(Ti,Zr,Hf)C contents using the SSP *** nanocomposites were characterized by a unique microstructure with in situ generated(Ti,Zr,Hf)C@C core-shell nanoparticles homogeneously mixed withβ-*** ablation behavior of the nanocomposites was evaluated on an air-plasma device for 60 ***,the nanocomposites exhibited excellent ablation resistance,and the lowest linear ablation rate reached−0.58μm/s at 2200°***,the ablation resistance can be dramatically improved by precisely tailoring the atomic ratios of metal elements within the(Ti,Zr,Hf)C phase via the molecular design of the *** formation of a multiple-oxide layer with both a high-meltingpoint phase((Ti,Zr,Hf)O_(2))and low-melting-point phases((Zr,Hf)TiO_(4))and glassy SiO_(2),as well as their structure,played a critical role in the enhanced ablation *** uniform distribution of the high-melting-point(Ti,Zr,Hf)O_(2)nano/microparticles throughout the glassy SiO_(2)matrix significantly enhanced the viscosity and stability of the oxide layer by the pinning effect,offering superior protection against the ingress of oxygen atoms and excellent resistance to mechanical erosion.

关键词： ultrahigh-temperature ceramics(UHTCs) multicomponent carbide nanocomposites ablation behavior multiple oxides

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Androgen receptor inhibits the hair follicle induction potential of dermal papilla cells by binding with Tcf4 at the A574 binding site

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Genes & Diseases 2023年第1期10卷 51-54页

作者： Nanlan Yu tianxing Hu Haichao Yangg Lian Zhang Lin Zhu Xiaofang Zhou Fei xiang Xichuan Yang Yuhong Li Department of Dermatology Southwest HospitalArmy Medical UniversityChongqing 400038China Department of Cell Biology Army Medical UniversityChongqing 400038China Institute of Burn Research State Key Laboratory of TraumaBurns and Combined InjurySouthwest HospitalArmy Medical UniversityChongqing 400038China

Androgenic alopecia(AGA)is the most common type of clinical *** receptor(AR)is the most logical candidate gene for regulating the occurrence of *** papilla cells(DPCs)are a special kind of mesenchymal cells,located in the hair bulb of hair *** play a role in maintaining and inducing the periodic cycling of hair follicles,and are considered as a key cell target of androgen in hair follicles.

关键词： clinical hair cycling

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A biosensing system employing nanowell microelectrode arrays to record the intracellular potential of a single cardiomyocyte

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Microsystems & Nanoengineering 2022年第3期8卷 185-198页

作者： Yuting xiang Haitao Liu Wenjian Yang Zhongyuan xu Yue Wu Zhajian Tang Zhjing Zhu Zhiyong Zeng Depeng Wang tianxing Wang Ning Hu Diming Zhang Department of Obstetrics and Gynecology Affiliated Dongguan People's HospitalSouthern Medical UniversityDongguan 523058China Research Center for Inelligent Sensing Systems Zhejiang LaboratoryHangzhou 311100China Research Center for Humanoid Sensing Zhejiang LaboratoryHangzhou 311100China Key Laboratory of Novel Target and Drug Study for Neural Repair of Zhejiang Province School of MedicineSchool of Computer&Computing ScienceZhejiang University City CollegeHangzhou 310015China School of Brain Science and Brain Medicine Zhejiang UniversityHangzhou 310058China School of Automation Nanjing University of Science and TechnologyNanjing 210094China College of Energy and Power Engineering Nanjing University of Aeronautics and AstronauticsNanjing 210016China E-Link Care Meditech Co. LtdHangzhou 310011China ZJU-Hangzhou Global Scientific and Technological Innovation Center Department of ChemitryZhejiang UniversityHangzhou 310058China

Electrophysiological recording is a widely used method to investigate cardiovascular pathology,pharmacology and developmental *** arrays record the electrical potential of cells in a minimally invasive and highthroughput ***,commonly used microelectrode arays primarily employ planar microelectrodes and cannot work in applications that require a recording of the intracellular action potential of a single *** this study,we proposed a novel measuring method that is able to record the intracellular action potential of a single cardiomyocyte by using a nanowell patterned microelectrode array(NWMEA).The NWMEA consists of five nanoscale wells at the center of each circular planar *** pulse electroporation was applied to the NWMEA to penetrate the cardiomyocyte membrane,and the intracellular action potential was continuously *** intracellular potential recording of cardiomyocytes by the NWMEA measured a potential signal with a higher quality(213.76±25.85%),reduced noise root-mean-square(~33%),and higher signal-to-noise ratio(254.36±12.61%)when compared to those of the extracellular *** to previously reported nanopillar microelectrodes,the NWMEA could ensure single cell electroporation and acquire high-quality action potential of cardiomyocytes with reduced fabrication *** NWMEA-based biosensing system is a promising tool to record the intracellular action potential of a single cell to broaden the usage of microelectrode arrays in electrophysiological investigation.

关键词： arrays potential record

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Wnt4 increases the thickness of the epidermis in burn wounds by activating canonical Wnt signalling and decreasing the cell junctions between epidermal cells

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Burns & Trauma 2023年第1期11卷 46-61页

作者： Fei xiang Pei Wang Hao Gong Jia Luo Xin Zhou Chenglin Zhan tianxing Hu Mengru Wang Yizhan Xing Haiying Guo Gaoxing Luo Yuhong Li Institute of Burn Research State Key Laboratory of TraumaBurns and Combined InjurySouthwest HospitalArmy Medical UniversityChongqing 400038PR China Department of Cell Biology Army Medical UniversityChongqing 400038PR China

Background:Burn wound healing is a complex process and the role of Wnt ligands varies in this *** and how Wnt4 functions in burn wound healing is not well *** this study,we aim to reveal the effects and potential mechanisms of Wnt4 in burn wound ***:First,the expression of Wnt4 during burn wound healing was determined by immunoflu-orescence,Western blotting and ***,Wnt4 was overexpressed in burn *** healing rate and healing quality were analysed by gross photography and haematoxyline and eosin *** secretion was observed by Masson *** formation and fibroblast distribution were observed by ***,Wnt4 was knocked down in HaCaT *** migration of HaCaT cells was analysed by scratch healing and transwell ***,the expression ofβ-catenin was detected by Western blotting and *** binding of Frizzled2 and Wnt4 was detected by coimmunoprecipitation and ***,the molecular changes induced by Wnt4 were analysed by RNA sequencing,immunofluorescence,Western blotting and qPCR in HaCaT cells and burn wound healing ***:The expression of Wnt4 was enhanced in burn wound *** of Wnt4 in burn wound skin increased the thickness of *** secretion,vessel formation and fibroblast distribution were not significantly impacted by Wnt4 *** Wnt4 was knocked down in HaCaT cells,the ratio of proliferating cells decreased,the ratio of apoptotic cells increased and the ratio of the healing area in the scratch healing assay to the number of migrated cells in the transwell assay *** nuclear translocation ofβ-catenin decreased in shRNA of Wnt4 mediated by lentivirus-treated HaCaT cells and increased in Wnt4-overexpressing epidermal ***-sequencing analysis revealed that cell junction-related signalling pathways were significantly impacted by Wnt4 *** expression of the cell junction prote

关键词： Wnt4 Wnt signalling pathway Burn wound healing Cell junction Cell migration

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Anomalous signals before 2011 Tohoku-oki Mw9.1 earthquake,detected by superconducting gravimeters and broadband seismometers

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Geodesy and Geodynamics 2014年第2期5卷 24-31页

作者： Gu xiang Jiang tianxing Zhang Wenqiang Huang Weihang Chang Zhiqiang Shen Wenbin Department of Geophysics School of Geodesy and GeomaticsWuhan University State Key Laboratory of Information Engineering in Surveying Mapping and Remote Sensing

The 2011 Tohoku-oki earthquake,occurred on 11 March,2011,is a great earthquake with a seismic magnitude Mw9. 1,before which an Mw7. 5 earthquake occurred. Focusing on this great earthquake event,we applied Hilbert-Huang transform（ HHT） analysis method to the one-second interval records at seven superconducting gravimeter（ SG） stations and seven broadband seismic（ BS） stations to carry out spectrum analysis and compute the energy-frequency-time distribution. Tidal effects are removed from SG data by T-soft software before the data series are transformed by HHT method. Based on HHT spectra and the marginal spectra from the records at selected seven SG stations and seven BS stations we found anomalous signals in terms of energy. The dominant frequencies of the anomalous signals are respectively about 0. 13 Hz in SG records and 0. 2 Hz in seismic data,and the anomalous signals occurred one week or two to three days prior to the event. Taking into account that in this period no typhoon event occurred,we may conclude that these anomalous signals might be related to the great earthquake event.

关键词： earthquake anomalous signals superconducting gravity data broadband seismic data Hilbert-Huang Transform

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Study on the Variation Characteristics of Haze Weather in Hubei Province during 1980-2012

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Agricultural Science & Technology 2015年第1期16卷 176-181页

作者： tianxing SU Mingfang XU xiang ZHOU Zaiqiang YANG Jijian YUAN Haiyan ZHANG Huangshi Meteorological Bureau of Hubei Province Jiangsu Key Laboratory of Agricultural Meteorology Nanjing University of Information Science & Technology

This paper, using the method of "the combination of 14 o'clock relative humidity, visibility and weather phenomena", selected haze days during 1980-2012 from 13 stations of Hubei Province, and studied years of variation characteristics of haze weather in Hubei Province. The results showed that the average annual haze days showed a fluctuant rising trend in whole from 1980 to 2012, but there were many peak value and valley value during the whole changing process; haze days of most stations showed an increasing trend, among which the stations with less than50 d haze days had a more obvious increasing trend, and the spatial distribution of annual mean haze days had distinct inhomogeneity. Haze days of Hubei Province presented the distribution characteristics of more in autumn and winter, and less in spring and summer, in which haze days during December-January were the most,and haze days during July-August were the least. Terrain had a big impact on local haze days, piedmont leeward zones were prone to haze days, mountainous regions were just the opposite. The research suggested that we should combine different situations with different stations instead of exclusively from the mean value of multiple stations when we analyze the mean change of haze days in a broader area, to investigate the overall changing trend and the reasons.

关键词： Haze Hubei Spatial and temporal distribution Terrain

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聚合物转化超高温陶瓷及其复合材料研究进展

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硅酸盐学报 2024年第9期52卷 2847-2861页

作者：江天兴周天赐文青波余兆菊熊翔中南大学粉末冶金国家重点实验室长沙410000 厦门大学高性能陶瓷纤维教育部重点实验室福建厦门361005 厦门大学材料学院厦门市电子陶瓷材料与元器件重点实验室福建厦门361005

超高温陶瓷是一类可承受超高音速长时间、跨大气层飞行和再入等过程所面临的极端服役环境的新型防热材料。目前,超高温陶瓷趋向于多元化和多相化发展,并通过与纤维等复合形成超高温陶瓷基复合材料。本文总结了聚合物转化超高温陶瓷及其... 详细信息

超高温陶瓷是一类可承受超高音速长时间、跨大气层飞行和再入等过程所面临的极端服役环境的新型防热材料。目前,超高温陶瓷趋向于多元化和多相化发展,并通过与纤维等复合形成超高温陶瓷基复合材料。本文总结了聚合物转化超高温陶瓷及其复合材料的研究现状,从聚合物先驱体陶瓷的发展历程、超高温陶瓷简介、聚合物先驱体法制备超高温陶瓷及其复合材料的制备方法、表征手段和材料性能等方面综述了近年来国内外的研究进展,并对其未来的发展趋势进行了展望。

关键词：聚合物先驱体陶瓷超高温陶瓷复合材料氧化烧蚀热防护

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